When using the Aegir hosting system with this module, errors appear when trying to migrate, backup, or clone a site. This is because Drupal is not fully bootstrapped during these operations and the module_load_include function is not defined. There are 2 instances of this function used to include the responsive_navigation_common.inc file. For me replacing these two functions with include_once fixed the issue and allowed Aegir to work properly to manage the Drupal site.